Concrete mold



. c. F. BOND.

CONCRETE MOLD.

A P P L l C A T l 0 N F l L E D 0 C T 5 1 9 2 O.

1 ,407,246 Patented Feb. 21, 1922.

warm/"5000 earssr CHARLES E. BOND, OF COULEE CITY, HASHINGE.01\l' oonoztnrn Morn.

Specification of Letters Patent. aflgenfed Feb, 21, 1922 Application filed October 5, 1920. Serial No. 414,853.

To all whom it may concern:

Be it known that 1, CHARLES F. BOND, a citizen of the United States, residing at Coulee City, in Grant County, and State of Washington, have invented certain new and useful Improvements in Concrete Molds, of

which the following is a specification.

My present inventionrelates to improvements in concrete molds designed especially as implements for forming concrete headers about the ends of a drain pipe that isin situ and used as a culvert orfor drainage across highways, the headers being utilized to direct the flow of water to and from the pipe ends, and to prevent erosion of earth at the ends of the culvert or pipe.

The primary object of the invention is the provision of a portable mold devicethat is comparatively inexpensive in cost of production, foldable in order that'it may be compacted and thus stored or transported, and which may be assembled or dismantled with facility for removal from the completed header when the latter has become set. i

The mold is patterned and of such shape as to provide a main vertical wall located transversely of the longitudinal axis of the pipe, and a pair'of integral, outwardly flaring wings which converge toward the open end of the pipe to direct the fiow of water thereto, or to permit the egress of water therefrom. In molding the header, the portable mold is designed to be fitted over; the end of the pipe, if desired, and the plastic concrete tamped into the mold, or the header may be molded in the device apart from the pipe, provision being made for an opening in the main wall of the header to subsequently receive the drain pipe.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention where'- in the parts of the foldable or knock down mold are combined and arranged accordlng to the best mode I have thus far devised for the practical application of the principles of my invention.

Figure 1 is a perspective view of a mold constructed according to my invention, as seen from the front, with the parts assembled to receive the concrete or other plastic material.

Figure 2 is a top plan view showing the mold applied to a pipe end and ready for pouring the material therein for thejformation of the header about the pipe and In the preferred form of my invention as illustrated in the drawings I utilize sheet metal plates that are hinged and braced together, and these plates may be foldedinto compact form for transporting to and from the place of work; The assembled mold is erected upon a suitable support as A which may be made up of boards, to form a base, or this base may be a permanent cement or concrete structure forming a foundation for the header to be molded thereon. v

The mold is designedtoforma vertical wall and two diverging wings, and for this purpose I provide a rectangular form,

standing erect, and comprising the rear plates 1 and 2, which are bolted together at their'vertical adjoining edges to form a seam 3, and these plates, which form a' rigid rear wall for-the mold, are provided with semi-circular openings to provide a circular orificeto fit around. the pipe 4, as indicated in dotted lines at 5 in Figure 1.

The plates 1 and 2 at their seam 3 are flanged, and secured together by bolts 6 to present an inner smooth wall for the concrete, and the pipe extends through the rear wall of the mold and contacts with the inner face of the front, integral plate 7, to prevent 'fiow of material into the pipe end while pouring the concrete. The single" plate 7 may be reinforced by means of the vertical brace bar 8 riveted thereto on its exterior, and the parallel rear wall and front wall of the main portion of the mold are joined by end walls 9 and 10. The front and rear walls and end walls are connected by hinge goints 11, through which the hinge rods or )itIS 12 are passed, and it will be apparent that by removal of some or all of these rods the several sections may be separated and piled or folded into compact arrangement for storing or transportation.

At their upper and lower edges these plates are bent outwardly to form reinforcing or strengthening flanges 13 to insure rigidity in the structure.

At the ends, the front plate 5 is cutaway as at B in Figure'l to provide an opening extending from the bottom of the plate a considerable distance to near the top portion of the plate, and in connection with these two openings a pair of complementary wing molds are associated with the main portion of the device in order to form a pair of diverging, integral wings from the main wall of the header that is formed in the main section of the molding device.

These wings have vertical hinge joints 14: at their respective inner sides and are joined to the front plate by hinge rods 15, and each mold wing comprises an inner wall 16, an 'outer wall 17 and an end wall 18 rigidly locked together with a top plate 19. The sides and ends of the wings have hinge joints 20, but the sides 17 or outer sides of the wings, contact with the corners of the main mold.

The sectional members of the wings are also fashioned with upper and lower reinforcing flanges 21, and the top plates 19 are bolted or secured to the walls of the wings by bolts or screws 22 passed through the edges of these top plates, which are perfo- I rated for the purpose, and the perforated top flanges of the wing sections.

The wing molds are rigidly held to the main mold sectlon by means of two palrs of braces or arms 23 and 24, the former extending from the front wall 5 to the inner sides of the wings, and the latter extending from the end walls of the main mold section to the outer sides of the wings of the mold.

For quick action in attaching or detaching the inner diagonally extending braces 23, I provide these metal straps with the end cars 25 which may he slipped over the top end of the pins 26 secured on the wing sides 16 and on the front plate respectively. The outer brace arms 24: are detachably connected at 27 and 28 respectively to the end walls of the main section and to the outer sides of the wing sections.

In pouring the material into the erected mold device, the plastic concrete is placed in the spaces formed by the wings of the mold andthe main section thereof, tamped,

and allowed to set. The material is forced into the wings and packed around the pipe end in the main section to form a solid wall about the pipe with diverging wings extend ing from the front of the main wall. After the material is set, the mold may be withdrawn by first pulling out the hinge rods, disconnecting the wing braces, removing the wing top-plates, and finally knocking down or withdrawing the main mold sections and swinging the wing sections out of engage ment with the wings of the header. In this manner a complete, integral header is. formed about the pipe end with outwardly diverging walls, preferably declining from the main wall of the header to the front ends, as shown.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is- 1. The combination in a header mold adapted to receive a pipe and of a main wall section having therear orifices to fit around a pipe end and a front plate to close said pipe end, said plate having cut-way portions, and separable wing sections hinged to said front plate adjacent the cut-away portions.

2. The combination in a header mold, of a main section having rear and front walls and an orifice in the former to fit round a pipe-end held in contact with the latter, and hinged end walls; said front plate having cut-away portions, a pair of wing sections, each comprising a hinged late, an additional side plate, a hinged fiiont plate, and a top plate rigidly holding the two side plates and front plate, and detachable braces connecting the wing sections and wall sec tion. 1

In testimony whereof I aiiix my signature.

onantns r. BOND. 

